Question

I am new to Python and am having trouble coming up with writing code to the following problem...

The program must:

1. Prompt for a file name
2. Opens that file and reads through the file
3. Displays a custom error message if the file does not exist
4. You can pull the hour out from the 'From ' line by finding the time and then splitting the string a second time using a colon.
   From stephen.marquard@uct.ac.za Sat Jan 5 09:14:16 2008
5. Accumulated the counts for each hour (key)
6. Print out the count for each of the hours after the program has completed execution. The counts should be sorted by hour as shown below.
   00 13
   01 17
   02 01
   03 29
7. You can download the data at mbox.txt when you are testing enter mbox.txt as the file name.
8. Following execution of the program, begin the quiz for this assignment Python Data Structures.
   • You will be asked to enter the counts for three of the hours your application displays (a portion of the grade for this assignment will be to get the counts correct).
   • You can take the quiz again if you get the counts incorrect.
9. You must upload your final code as a TEXT file in the question at the bottom of the quiz to receive points for the code. Make sure the filename includes your name

Answer 1

#Array for storing hours count
hoursCount=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
filename=input("Enter file name:")
#handling file not found exception
try:
   f=open(filename,"r")
   #reading first line from text file
   line=f.readline()
   #iterating through all lines
   while(line):
       #If the line start with string From then we split the line to get hour value
       if line.startswith('From'):
           time=line.split()[5]
           hour=time.split(':')[0]
           #increasing count in the hoursCount array
           hoursCount[int(hour)]=hoursCount[int(hour)]+1
       line=f.readline()
   #printing the hours count in sorted order
   for i in range(0,24):
       if hoursCount[i]!=0:
           print(str(i).zfill(2)+" "+str(hoursCount[i]))
   f.close()
except:
   print("File not found")
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